Injector



(Model.)

L. W. LOMBARD au W. OONNOR.

INJECTOR.

Patented ApLZB, 1889.

Mllllllllllllllllll NTTED STnTns PATENT trice LEVI lV. LOMBARD AND 'TLLIAM CONNOR, Olf1 BOSTON, MASSAOIlllSl'll'lS.

INJECTOR.

SPECIFICATION forming part of Letters Patent No. 401,753, dated April 23, 1889.

l Application filed April 2, 1838. Serial No. 269,356. (Model.)

To aZZ whom it may concern:

Be it known thatwe, LEVI lV. LOMBARD and WILLIAM CONNOR, citizens of the `United States, residing at Boston, in the county of Snitolk and State of llfassachusetts, have invented certa-in new and useful Improvements in Injectors: and we do hereby declare the following to be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying' drawings, and to letters or iigures of reference marked thereon, which form a part of this specification.

This invention relates to injectors, more particularly that class termed lifter-inject ors, which are adapted to draft and lift their own supply in lieu of having said supply delivered to them under more or less pressure. Injectors of the class above premised are supplied with a relief-valve and overliowchamber, so called, and during the interval which lapses between the admission of steam to the injector and the iiow of fluid consequent thereupon said steam is allowed to escape by means of the relietvalve when starting or restarting the apparatus.

The primary feature in our invention conssts in the position and operation of the relief-valve, the latter being mounted upon the receiving end of the discharge-cone.

Furthermore, our invention consists in the general arrangement of the inj ectorby which it is simplified in form, being composed of only three principal pieces, which are easily and readily put together, thereby largely reducing the expense of manufacture.

The drawings herewith annexed represent in Figure l. avertical central section through an injector embodying our invention. Fig. 2 is a similar sectional portion in which the relief-valve .is shown open.

In said drawings the body of the injector is shown as composed of acentral cylindrical tube or shell, A, interiorly screw-threaded at each end and centrally provided with a partition, B, cast therein, which divides it into an upper and lower portion, respectively, c b. Said partition further separates two chambers, C D, circular in cross-section, which are formed by two hollow arms castdi ametricall y opposite upon the body A. of. the injector.

C represents the overflow-chamber rco-operating with the relief-chamber and valve,whcn the latter is open.

D represents a chamber connecting with the uidsupply.

At the upper end portion, fr, of the injector is disposed a screw-threaded nipple, E, provided with a contracted bore, c, double cone shape in longitudinal section, and which is termed the steam-cone. This nipple E connects with the steam-supply .trom the boiler. Longitudinally aligned therewith, centrally of the bore of tube A and cast integral with the partition B, is disposed the combiningcone d, which extends upwardly beyond the lower end of the steam-cone, which is in partinclosed therein, leaving an annular opening between the two for the passage of the i'luid from the suppl y-ehamber l).

At the lower end portion, b, of the tube A, and in engagementtherewith, is disposed a nipple, F, having cast thereon a tubular projection, e, cylindrical exteriorly, and with a coneshaped bore tapered downward. Said projection is termed the discharge-cone.77 About the upper end of said discharge-cone e we have loosely mounted the relief-valvef, which consists 0i a section of a tube open at both ends, and with its upper end l'lared and adapted to be seated against the partition l and in alignment with the lower end of the combining-cone d. A spring, t, coiled exteriorly about the dischargecone c, serves to actuate the relicf-valve and also limit its downward movement when opening.

An aperture, 7L, connects the overflow-chainber C with the relief-chamber G, always open to the atmosphere, and the latter chamber has no communication whatsoever with the supply-fluid when the injector is in operation.

The flow of steam is indicated at arrow l, the fluid-supply at arrow 2; discharge of said liquid to the boiler at The entrance of the end of the steanrcone c a certain distance within the combining-cone is to produce a better condensation and consequently a more efficient result with greater forcing and lifting properties.

The operation of the injector is as follows, the various component parts being shown, as in Fig. 1, with the relief-valve closed, and the injector being reqi'xired to lift its own supply.

IOO

Upon admission of steam through the steam and combining cones, no liquid being' present, the pressure of said steam pushes down the relief-valve by impinging upon its flared mouth, and the steam is thus allowed to escape through the relief-chamber G, aperture 7L, and overflow-chamber O, as indicated. (See Fig. 2, and arrowlC in Fig. l). The valve is thus held open until the air in the supplypipe is expelled, when a rush of fluid occurs in direction of arrow 2 through the combining-coned, and thence into the discharge-cone e. VVheli said iiuid -supply is established through the injector, a sucking action occurs about the upper end of the discharge-cone e, and the relief-Valve f, aided by its spring g, quickly rises and is seated againstthe partition. Since the relief-chamber G is open at all times to the atmosphere by its aperture 71 and while the injector is in active operation, With the fluid-supply passing to the boiler, a suction or a tendency to an inflow of air about the relief-valve (now seated upon the partition B) is produced, (see arrow 5,) and the resultant action only'serves to hold said valve more securely in place and closed. When the steam is shut off and the fluid-supply ceases, the Valve remains closed, as shown; in fact it is open only in the act of starting the injector, and when an outlet is required for the steam before the fluid-supply commences to flow.

Vhat we desire to claim isl. In general combination, the injector composed of the tubular body A, the partition B, with the combining-cone (l, the supply and overiiow chambers D C, the aperture h, the relief-chamber G, the discharge-cone e, located therein, and the relief-valve f, With its spring g, as and for purposes set forth.

2. In an injector provided Wit-h a reliefchamber constantly open to the external air, a discharge-cone, e, located therein, the reliefvalve j', movable upon said cone and adapted to engage with the outlet-mouth of the combining-cone, in combination with a dischargecone, e, and the steam-cone c, aligned therewith, projecting within and partially inclosed by said combining-cone, for purposes stated.

In testimony whereof We affix our signatures in presence oftwo Witnesses.

LEVI WV. LOMBARD. WILLIAM CONNOR.

ll'itnesses:

II. E. LODGE, R. W. LODGE. 

